Hi I currently have an iPhone 4. Once the new iPhone comes out, I want to ship my iPhone 4 to my parents. They don't want to pay for data nor do they need it. I heard at&t has the ability to detect whether or not you are using a smart phone or a feature phone and they will automatically sign you up for a data plan when you switch out your SIM card. My iPhone 4 is currently unlocked via at&t's official unlock. I don't want to jailbreak the phone, so is there any way I can get the phone working on my parents account without worrying at&t will add a data plan to them. I read that I have to change the APN settings, but I'm not exactly sure how to do that. Maybe a link to a webpage would be helpful? Also can I revert the APN settings to their original settings? Thanks for all your help!